Yes. A blanket authorization regarding actual expense reimbursement may be issued to your employees assigned to perform TDY travel in an area subject to a Presidentially-Declared Disaster. These authorizations must apply to a specific Declaration, and must end on the expiration date of the Declaration, or one year from the date the Declaration is issued, whichever is sooner. A blanket authorization issued under this section shall not apply to any travel performed pursuant to chapter 302 of this title.
41 C.F.R. §301-70.201